Track the SEL erase time

It is useful to know the last time SEL Clear was called, so
save the timestamp in a file and return it in the Get SEL Info
response.

Tested:
Ran 'ipmitool sel info' and noted the time.
Ran 'ipmitool sel clear'
Ran 'ipmitool sel info' and confirmed time had updated.

Change-Id: I81626a3bc78ffe06316a14422fab4f42a9f18217
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
1 file changed